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page 112 of 132
ToolVox® X3
Administrator Guide
impactsCanonicalMapping,RelocatedMappingandVirtualDomains.
Postfix support programs and daemons dir
ThisoptionspeciesthedirectorywherePostxwilllookforitsvarioussupportprogramsand
daemons.Thedirectoryshouldbeownedbyroot.Thisoptioncorrelatestotheprogram_directory
directiveanddefaultsvarydependingoninstallationmethodandOSvariant.OnmanyLinux
systemsthiswillbe/usr/libexec/postx.
Relocated mapping lookup tables
Postxcanprovidearelocationnoticeinresponsetomessagessenttouserswhonolongerreceive
mailfromthisserver.Ifenabled,thisoptionspeciesthelocationofthelecontainingatableof
contactinformationforuserswhonolongerexistonthissystem.Bydefault,thisfeatureisdisabled.
Thisoptioncorrelatestotherelocated_mapsdirective.Ifenabled,areasonablechoiceforthis
optionmightbe/etc/postx/relocated.
Disable kernel file lock on mailboxes
OnSunworkstations,kernellelockscancauseproblemsbecausethemailtoolprogramholds
anexclusivelockwheneveritswindowisopen.UsersofotherOSvariants,orSunsystemswhere
noSunmailsoftwareisinuse,mayignorethisoption.Thisoptioncorrelatestothesun_mailtool_
compatibilitydirectiveanddefaultstoNo.
Max time to send a trigger to a daemon
ThisoptionspeciesthemaximumamountoftimeallowedtosendatriggertoaPostxdaemon.
Thislimithelpspreventprogramsfromgettinghungupwhenthemailsystemisunderanextremely
heavyload.Thisoptioncorrelatestotheopts_trigger_timeoutdirectiveanddefaultsto10seconds.
Address Rewriting and Masquerading
Postxoffersarelativelyeasytouseandexibleaddressrewritingsystem,allowingittoactasa
mailgatewayforalargenetworkorasagatewaybetweenlegacymailsystemsandtheInternetat
large.
Note
TheoptionsonthispagearealsodiscussedonthePostxConguration-Address
ManipulationpageatthePostxhomepage.Itisworthreadingifadvancedaddress
rewritingisrequiredinyourmailsystem.
Rewrite “user%domain” to “user@domain”
Thisoptionisusefulforsomelegacysystemsthatusedstrangeaddresstrickery,suchas
user%domain@otherdomain.Itisnotgenerallyusefulinmodernenvironments,butitisnotharmful
soitusuallydefaultstoYes.Thisoptioncorrelatestotheallow_percent_hackdirective.
Rewrite “user” to “user@$mydomain”
ThisoptioncongureshowPostxwillhandleanaddressthathasnodomainnameinthe
destination.Ifenabled,itwillappendthevalueof$mydomaintotheaddress.Thisoptioncorrelates
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